I missed this in the original paper. This poses the question of how to specify a distribution on the initial x0 while not asking too much from the user.

The following points will be assessed before proceedings with a solution:

• benchmark BIPOP with and without re-sampling x0 upon restart
• benchmark re-sampling a new x0 from within the search trace of past runs
  Benchmarking should especially check against the multi-modal functions of BBOB.